4/18/2021 Yi Sunji's Contributions to Astronomy

While Jang Youngsil is probably the most famous inventor in Korean history and contributed to astronomy with his inventions, he was not the only person to contribute to astronomy. Yi Sunji, an astronomer, contributed to it too. Like Jang Youngsil, King Sejong the Great respected Yi Sunjiโ€™s contributions in astronomy.

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